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E. BIEDRRMANNXE E. W. HARVEY.

APPARATUS lPOR UTILIZING WASTE GASEOUS PRODUCTS.

lPaJcem'ced Deo. 16. 1800.

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Patented Dec. 16, 1890.

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E. BIEDERM-ANN xv E. W. HARVEY. APPARATUS FOR UTILIZING WASTEGrASEOUS'lRODllTG'lS-v No. 442,600. Patented Dec. 16, 1890.

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UNITED STATES rPATENT Garros.

EMIL BIEDERMANN AND ERNEST IVILLIAM IIARVEY, OF lVESTMINS'IER, ENGLAND,ASSIGNORS TO FREDERICK SIEMENS AND ALEXANDER SIEMENS, OF SAME PLACE.

APPARATU S FOR UTI LIZI NG WASTE GAS EOUS PRODUCTS.

SPECIFICATION forming part of Letters Patent No. 442,600, dated.December 16, 1890.

Application filed August Z6, 1889. Serial No.322,062. (No model.)Patented in England November 18, 1884:,v No. 15,127.

To aZZ whom t may concern:

Be it known that we, EMIL BIEDERMANN, a citizen of the SwissConfederation, and ER- Nasr WILLI AM HARVEY, a subj ectof the Queen ofGreat Britain, both residing at 10 Queen Annes Gate, Westminster, in thecounty of Middlesex, England, have invented a new and useful ImprovedApparatus for Utilizing lVaste Gaseous Products, (for which we haveobtained a patent in Great Britain, dated November 1S, 1884, No.l5,l27,) of which the following is a specification.

It has been proposed to utilize gaseous products of combustion fromfurnaces by causing them to pass through incandescent fuel, so that thecarbonio anhydride which 'they contain may become converted intocarbonio oxide capable of serving for combustion.

Our invention relates to means of thus utilizing products of combustionas they escape in a highly-heated state from regenerative gas-furnaces.For this purpose we provide near the furnace a chamber arranged withsuitable means for charging it with fuelsuch as coal, coke, oranthracite-and for removing` ash, and with inlet and outlet passages forthe gases. Having iirst raised the fuel to a state of incandescence,which may be done by admission of air, as in ordinary gas-producers, weby means of an artificial draft, which ma)T be produced by a jet ofsteam or gas, or by a fan or blower, cause to pass through the hot fuela portion of the hot gaseous products of combustion from the furnace,these having themselves sufficient heat to maintain the fuel at atemperature suitable for conversion of the carbonio anhydride intocarbonio oxide, which, with other gases produced, is returned to thefurnace to burn therein. Two fuel chambers may be employed to operatealternatelyin the following manner: \Vl1ile the one chamber is acting,as above described, for conversion of carbonio anhydride into carboniooxide, the other chamber, containing highly-heated fuel, may act as aregenerator, heating the combustible gases passed through it before theyenter the furnace. As only a portion of the gaseous products ofcombustion can be heated in the manner described, the remainder ispassed through a regen erator for the purpose of heating the air-supplyof the furnace in the usual way. The forms and arrangements of the.chamber or chambers may be varied.

The accompanying drawings show several arrangements as examples,illustrating how our invention may be carried out in practice.

Figure l is a longitudinal section, and Fig. 2 is a transverse section,showing our invention applied to a retort-furnace. From the upperchamber, containing the retorts R, a

lportion of the gaseous products of combustion is caused, by means of ajet B of steam or gas, to descend a flue A to the mass of hot fuel F,through which it passes, so that the carbonio anhydride which itcontains, by taking up additional carbon from the fuel, becomesconverted into carbonio oxide. This, with the other gases produced,ascends to the retort-chamber, where they are burned with the hot airsupplied through the regenerators S S. C is a passage that can be openedwhen required for admitting air or stowing the fuel. D isa door forremoval of ashes, and E the opening for feeding the fuel, which in thiscase may be hot coke as it is drawn from the retorts R.

Fig. 3 is a longitudinal section, and Fig. 4 a transverse section, of aretort-furnace operating as already described with reference to Figs 1and 2, the feed-opening E being in this caso made through the bottom ofthe retort R.

Figs. 5, G, and 7 are sections showing several forms of chambers andtheir passages, suited for operating in correspondence with thealternating action of the regenerators of a regenerative gas-furnace. Inthese the passages are arranged symmetrically on each side of thefuel-chamber. The jets B B or valves V V and XV XV are provided induplicate, so as to direct the current either as shown in the figures orin the opposite way. Thus when the regenerator R on the one side isbeing heated by the products of combustion from the furnace and theregenerator R', which has been previously heated, is heating theairpassing to the furnace a portion of the products from the furnace iscaused to pass through the hot fuel F in the direction shown. When theaction of the regenerators is reversed, the jets and valves are alsoreversed to send the products in the opposite direction through F.

Fig. 8 is a section of a regenerative gasfurnace, to which twofuel-chambers F .F are applied; and Fig. 9 is a longitudinal section ofone of these chambers. While a portion of the products from the furnaceis caused to descend the flue A and to pass through the hot fuel F, thecombustible gases produced in the chamber F, along with such as may besupplied by a pipe K from another source, are caused to pass along across-flue H and down' through the previously-heated fuel in F', so asto become heated before they ascend the Hue A to the furnace. Thecurrent through F and F may be caused by a jet B in the flue H, this jetbeing directed in the opposite Way when theregenerators R R arereversed. G are passages for admitting air, if required.

Figs. l0 and l1 show a similarl arrangement with the upper part of thefuel-chambers F and F made with cro'sspartitions P P, with openingsthrough them, so that the hydrocarbons evolved from the upper layers ofthe fuel pass down with the products from the furnace and through thehot fuel below. These hydrocarbon products might, however, be led offseparately, as shown in Fig. l2, by a fine L for that purpose.

Ilaving thus described the nature of our invention and the best means Weknow for carrying the same into practical effect, we claim- 1. Thecombination, in a regenerative gasfurnace, of a furnace orcombustion-chamber, a regenerator in which the air for supportingcombustion is heated, a gas-producing or fuel chamber external to thecombustion-chamber, lines for conducting the air and gas from theregenerator and the gas-producer to the combustion-chamber, and fluesconnecting the combustion-chamber with the regenerator and thegas-producer, whereby a part of the Waste gases from thecombustion-chamber passes through the regenerator and a part passes tothe gas-producer, substantially as and for the purposes described.

2. The combination, in a regenerative gasfurnace, of a furnace orcombustion-chamber, a regenerato'r in which the air for supportingcombustion is heated, a gas-producingor fuel chamber external to thecombustion-chamber,

.ilues for conducting the air and gas from the regenerator andthegas-producer to the combustion-chamber, fines connecting thecombustion-chamber with the regenerator and the gas-producer, whereby apart of the Waste gases from the combustion-chamber passes through theregenerator and a part passes to the gas-producer, and a blast-pipearranged in the ue leading from the combustionchamber to thegas-producer, substantially as and for the purpose described.

3. The combination, in a regenerative gasfurnace, of a furnace orcombustion-chamber, reversing-regenerators arranged in Iiues leading tothe stack at the opposite sides of the combustion-chamber, agas-producing chamber or chambers external to the combustionchamber, uesleading from the regenerators and the gas-producer to both sides of thecombustion-chamber, and flues leading from both sides of thecombustion-chamber to the regenerator and` the gas-producer, whereby apart of the waste gases from the combustioncha-mber passes through theregenerator and a part passes to the gas-producer, substantially as andfor the purposes described. In' testimony whereof we have signed ournames to this specification, in the presence of two subscribing witnesses, this 9th day of August, A. D. 1889.

EMIL BIEDERMANN. ERNEST VILLIAM HARVEY.

'Witnessesz VALTER J. SKERTEN. WV. J. NoRWooD, Both of 17 GfrctcechurchStreet. London, E. C'.

